It reads your whole book before it answers.
Most writing assistants see the paragraph in front of them. Scriptorium searches your entire manuscript, your canon and your notes first — then tells you what it found and which file it came from.
It runs on your own computer, and your book never leaves it — unless you choose to use a cloud service, which is there for writing on a laptop that cannot run a model of its own.
Windows 10/11 · Free version has no book limit and no time limit · Pro is a one-time $59
A long series breaks the tools built for one book
By book four you cannot remember what you established in book one, your notes disagree with your chapters, and no assistant can hold a million words in its head. Scriptorium is built for exactly that problem.
It remembers
Every chapter, character sheet and note is indexed as you write. Ask about a minor character from three books ago and it finds them.
It investigates
Ask whether something breaks continuity and it searches the manuscript before answering, then names the files it read. No confident guessing.
It marks its guesses
Established canon, what is on the page, your private notes and the model's own inference stay separate. A guess never becomes fact on its own.
It never overwrites
Every change arrives as a proposal with a diff. You accept or reject it. Nothing touches your prose without a click.
It finishes the book
Print-ready PDF and EPUB from the same files, with a checklist that catches a cover built for the wrong page count before the printer does.
It travels
Translate a chapter or a whole book into twelve languages, on your own machine, with your formatting left intact.
Ask how it reads to someone who does not know the ending
Turn on Agent as Reader and your unrevealed lore and author notes are withheld from it entirely — not down-ranked, withheld.
It is the only honest way to ask whether a chapter lands for a first-time reader, because the answer is worthless if the thing answering has already read your secrets.
This is why Scriptorium keeps established canon, manuscript, private notes and model guesses in separate places. The wall is what makes the answer trustworthy.
Half of it needs no AI at all
The free tier is a complete writing tool, not a trial. No book limit, no time limit, nothing switched off after a fortnight.
Free, forever
- The editor, with Markdown formatting and a rendered reading view
- Full-text search across everything you have written
- Print-ready PDF and EPUB building
- The publish checklist — page counts, spine widths, cover sizes
- A codex of your characters, places and peoples — it can find the names in your manuscript by counting, with no model at all
- A chat that answers from your own files: word counts, chapter lengths, where a name appears, and an editorial pass over your prose
Pro adds the collaborator
- Ask about your book in your own words
- Modes for building characters, lore, history and scenes
- Ghostwriter — drafts a chapter from your outline
- Reads a chapter and proposes codex entries from it
- Search by meaning, not only by words
- Translation into twelve languages
It catches the mistakes that cost money
Cut a section and your page count moves. Everything downstream of it is now quietly wrong, and nothing tells you until the proof arrives.
It reads the real page count
From the typesetting log, the same place your build script reads it.
It checks the cover against it
A wrap cover is generated for one exact page count. Scriptorium compares yours against the template it was built on and tells you in pages, not pixels.
It flags the prose that went stale
Print cost is quoted per page. If your pricing notes still cite a count the book no longer has, you are quoting the wrong price.
Nothing here is stored or hand-maintained. It is worked out from your files every time you look, so it cannot go stale the way a written checklist does.
Reach readers who do not speak your language
Translate a chapter to check it, or a whole book to publish it. Nothing is uploaded anywhere.
Translations are saved beside your manuscript in folders matching your own, and kept out of the search index — so a translated sentence can never come back as a search result about your own world.
Headings, formatting and anything marked as code are left alone.
Built against a real saga, not a demo
Scriptorium was written alongside a ten-book, 1.09 million word series, and every feature in it exists because that book needed it.
words indexed
searchable passages
to read all of it
bytes sent anywhere
Questions
Does my manuscript go to the cloud?
Not unless you choose a cloud service. Out of the box everything runs on your own computer, including the language model, and the whole app works with no internet connection at all.
If your laptop cannot run a model — and most writing laptops cannot — you can connect your own OpenAI or Anthropic account instead. That is a deliberate choice you make in Settings, it is off until you make it, and even then only your question and the passages relevant to it are sent, never the whole book. Your key is encrypted on your machine.
What happens to my files?
They stay as plain Markdown in ordinary folders. There is no database and no proprietary project file to be locked into or corrupted — every other tool you own can still open your book, today and in ten years.
Do I need a powerful computer?
For the free tier, no — searching, writing, building and the publish checklist run on anything that runs a browser.
Running the collaborator on your own machine wants a reasonably modern graphics card, around 8 GB of video memory. Writers are not gamers, and a thin laptop you carry to a coffee shop will not have that. So the collaborator also works through your own OpenAI or Anthropic account, on any machine, however light. Same tool, same answers, your hardware is no longer the deciding factor.
Is it a subscription?
No. Free is free forever with no book limit. Pro is one payment.
Will it write my book for me?
It will draft a chapter from your outline if you ask it to, and it will tell you which paragraph of that draft is weakest. But it is built to be most useful on the questions you cannot answer alone — whether a scene contradicts book two, whether a character still sounds like herself, where the middle sags. Its judgement about your book is worth more than its sentences.
Can I move it to another computer?
Yes. Your licence key keeps working; remove it from one machine and enter it on another whenever you like.
Start with the free version
Point it at a folder. It adds whatever structure is missing and never touches a file that already exists.
Come and say hello
Need support, or want to give feedback or ask for a feature? Ask in Discord. As the community grows it is also where you can trade ideas with other authors and other people using Scriptorium.
Discord is the only way to reach me. I am one person, and email and phone numbers fill up with spam faster than I can read through them.